Clutch.



Patented Oct. 8, 1912.

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. Specifications! Iictters Patent. Application filed Ialy 12, 1911. Serlalm). 888,183.

crimes.

lfatentedOct. 8,1912.

To all whom it may concern; I I

Be it known that I, Gsoncn T. Tnrmnnn, a citizen of the United States, resid1ng at Cleveland in the county of Cuyahoga and State of hio, have invented a certain new and useful Improvement in Clutches, of

, instantly released therefrom'flafter it has traveled therewith a predetermined amount.-

' My clutchis well adapted for use in varione machines wherein a normally idle driven part must be accurately started and stopped, whether it makes a single rotation or aplurality of rotations or a part of a rotation on each I movement,

" The invention comprising' the. means: b

hereinafter more -fully described andits essential characteristics are set out in the claims.

In a drawings, F g.1... 1 is a longitudinal central section through my' clutch mounted .'on a suitable driving shaftf, com

binedwith' a roller on the same sha t constituting a driven member; Figs. 2 and 8 are transverse sections'on the lines 2-2 and 3-3 of Fi Fig. 4 is a ire mentary radial section on this lined-310iv ig.2.

In the drawings,'10 represents the driving shaft, 11 is the driving member of the latch, and 12 a driven member. The mem ber 11 is shown as a cup having a hub 18 by which it is pinned by a pin14 to the shaft. The wall 15 of thecu 1B cylindricalinternally and is shown as eing also cylindrical externally whereby its exterior may constitute a roll ber 11 the driven member.v

- The member 12. is shown as a roller having an internal bushing 10 which loosely surrounds the shaftJThxs'bushing is shown'as 1, each looking toward the left? I arcs aboutthree centers, thus presenting;

or having rollin coaction' with. any mechan1sm'(not shown or, if.des1red,-

formed with an annular oil space adjacent to the shaft connected by a radial opening 1 7 with. the exterior of the roller 12. Surrounding the projecting end of the bushing 16 and secured to the end of the roller is a disk 18. This disk is shown as held to the roller by suitable screws 19. The disk is provided with a notch 20 in its periphery adapted to be occupied by the nose 21 of a controlling arm 22v Accordingly, this arm may hold the roller 12 positively against movement.

Loosely mounted on the shaft within the cup portlon of the member 11 is a spider 25 eonnected by pins 85 with the disk 18. Accordingly, the spider, pins, disk 18, bushing 16and rolle 12 all rotate, or remain stationary," as a unit, and thus together constitute, the real driven member. Accord- ,1ngly, when the driven roller'l2 and the disk T l8zare held normally stationary by the arm y 22, the "clutch mechanism carried by the which I accomplish the accurate driving, is

'spiderwithin' thewall 15 is also held stat ona I, and the driving member revolves indepen ently-of the internal clutch mechanism. Pivoted to this spider 25 are shoes 26'adapted-to bear against the inner periphery, of the'wall 15. Twoofthese shoes are, shown; They are pivotedby means of p1ns'29 passing through ears 27 of the shoes andreduced portions 28 of the spider, onto 0 posite sides of which the ears extend. he outer surface of the shoe is formed in 8. heel portion 46 concentric of the pivot 2 a gripping portion 45 eccentric of such pivot, an a portion 47- concentric of the shaft 16 and always out of contact with the wall 15. Compression springs 80 mounted in recesses on the inner face of the shoes and the outer edgeof the spider tend to force the shoes agalnstthe-inner periphery of the wall 15. The spider also is shown as having a pair of leaf s rings 82 secured to it by cap screws 1 hese eprm s-also bear against the inner'perlphery o the wall 15. The operation of this'internal clutching mechanism will be hereinafter described.

Between the s ider 25 and the driven disk 18 is a disk 40, oose on the shaft and havmg holes 41 in it through which the pins 85 loosely extend, the holes being considerably larger than the ins. The alas are shown as having a slip; \tly enlarge central portion 86 preventing their working axially into cont-ac wi mounted 'inyit'r and, projectin into-the 'cup 11 adjacent to thetheels of the shoes 26.

.The disk 40 has a notch 44 in its periphery adapted to stand alongside of the notch- 20 1 and to be occupied by 'the nose 21 of the controlling'arm'22a It will be seen from the construction dcscribed that all the arts of the mechanism shown are normally 1dle, with the exception of the shafthnd driving member 11, the direction of rotation of theseparts being indicated bythe arrow inFig. .2. This figure representsthe .parts in theirclutched condition just before being unlocked. When unlocked,: the toe portion .47 of the shoes are swung inward so that the heels 46 lie close to the wall of the cup. Theline connectingthe engaged portion of the shoe .with the pivot 29 is at an angle to the line connecting such pivot with the axis of the shaft 16, so that the spider and shoe make a toggle joint tending to straightenby reason of the drag on the shoes of the normally rotating wall 15. -Accordingly, the rotation of the driving member keeps the heels ofthe shoes against the now stationary pins 42 (held 'by the .no se'21 in the notch.44) and thus holds theme shoes swung inwardly against the force of the 'springsBO, andfree enough from {the wall 15, to allow-, inde=.

pendent movement',but' close enough thereto to be ready to instantly engage ,the wall.'

This action on. the shoe is rendered more certain 'bv ;the grip of the. leafs'prings 32 against the'w'a l,'15,which thust tends fto rotate the spider and insure propencom'prs sionfof. the springs 30. Now,-whe1 r'the arm 22 is raised, not only is' thefdrivfefnmemher released butalso the loose disk'40, and there'- upon the pins 42 cease to be stationary abutmeats, and thosprings'ilo, together with the tending of the rotation to straightenthe line of ",the toggle, force the "shoes outwardly,

shoving on,.thc pins 42 and turningv the, disk 40 ahead. slightly. In this, movement, the.

shocszgri "the wall 15 and the spider and shoes am .the rest of the driven member rotate wanna driving member. ,The' 's ace in the 110103 41 around the pins 35.,allow the independent movement, of the {disk 40, as explained. After the rotation of the driven member has begun, the nose{ 21'ef the arm 22 may be allowed to rest on. the periphery [of the disks '18 'andL-,+10,so. that' when the rotation 'is completed the nose willtravel'into the notches "44 and 20 and stop the rotation of the-driven member.

In such operation the far end of the notch.

44 engages the "front orhthe nose before the far end of the no'tchf 20. enga es, and duringthis sliortfinterval the ,IOllltlVQ retardf ing ,oftho dislc tOfreIcases the clutch by. reason of the pins 49 acting on the shoes so .ing on the shoe to hold it out of engagement and means normally.acting, on the independbf h k thatzallthe dri en parts'come'to' t with "theends of the notches 44 and 20 both engaging the .face of the-nose 21. ablesthe-accuratestopping of the clutch de- This ensired.

The engagement of the clutch, as above explained, is instantaneous as soon as the arm 22 is raised. I have shown but one notch 20 and 44 on their respective disks, but this is to be taken as illustrative of any number, according to the amount of rotation-desired with each engagement of the clutch. In the embodiment shown, the clutch makes a single rotation for each engagement if the member 22 is allowed to return during such rotation. Obviously, however, this member may be held out of action for as long a period as desired, whereby the driven member will receive continuous rotations.

The arm 22 may be operated by any suitable means. As shown, it is a lever loose on a shaft 48. Pivoted to this lever is an arm 50 on which is a roller 51. The arm 50fis normally held in the position shown by a leaf spring 52 secured to the lever. With such construction, a suitable cam indicated b 54 and acting on the roller 51 may 'raiset e lever 22 to, free the clutch, the

. (lighter. than the spring 49) to allow such movement. The slight rear'shoulder of the notches44 andif20 prevents the idle driven member at any time being accidentally turned in the wrong direction.

llaving'thus described my, invention, what I claixnasz- ,1. In a clutch, the combination of a driving'meniber, a driven member, means for establishiu r a frictional drag, between them, a clutch sioe connected with one of said members, means foi"causing the shoe to engage theother member, a rotatable member capable of independent rotative movement and having means adapted to act on the shoe to hold itphtof engagement, and a controlling device for said rotatable member.

Ina clutch, the combination of a driving member, a driven member, a spring 'maintuinin constant friction between them.

a clutch sioe connected with one of said members, a spring tending to cause it to engage with thcother member, a rotatable member capable of independent rotative movement and having means normally actentfmombcuto hold. it against rota tion.

8. la a friction clutch, the combination of n s m oted shoe-con bersand {fadaptedi to fi'iction'ally '1- on go s a smooth surface of the other 'mem er, a spring. acting on -thje.,shoe;and.- tending to cause such engagement,;ai rotatable device I havingmeans acting on the heel of the shoe 1 4. In a clutch, the combination of co-' to swing it against the action of the spring.

to,free the-engagedmember, and means for controlling the saidrotatabledevice.

axial driving and drivenmembers, a spring secured to'one of-said members andconstantly bearing a ainst the other to establislra frictionalt rag between them, a pivoted shoe connected-with'one of said members and adapted toengage the other mem-v ber,a spring-acting on the shoe and tending to'cause such engagement, 9; coaxiall rotat'abledisk havingmeansacting on t e heel of the shoe to swm itfagainstthe action of trolling the independent membenlf i i n p8; ,In' a, friction-clutch, theycoinbination,

thespring to free t 10; engaged member, and an'arm adapted to engage a shoulder on the diskvfor controllin its rotation. Z,

5.-,In a frictionc utch', the combination of a rotatable memberhaving acircular recess =witha smooth wallyaj secondrotatable member ashoe pivotally;..,mounted 'on'said secon .member,.- a;- spr1n between the second.

memberjand shoe ten ing to force theshoe into frictional engagement {with the wall of the recess, undja t ird rotatablelmember capable ofsomeirotation ,independentlyfof the a two; members mentioned; a projectioir car-. ried by theindependent memberand bearing against the heel of the ishoe; and} means for controlling the independent-member. A

' 6. In a clutch, the combination of.ja rotatable member-having:v circular"reeess,a coaxial rotatable mem r, means fo'r'establishing a frictional dragbetween thetwo, shoes pivotally 2 mounted on the last mentioned member and 'adaptedto engage with the wallof the recess,'a coaxial member mounted between the .two members mentioned andcapable of some rotation independently there pendent member, va -shoulder carried by it adapted to hold the shoe out of driving contact with the recess wall, andmeans'for conwith a shaft, of-a member rigid thereon'having a circular recess with a smooth wall, a

r1venmember,-"a pivon such pivot, the shoe havin s ider loosely surrounding the shaft within t e recess, clutch shoes pivoted to the spider, springs acting. against the spider and shoes tending to Icause the shoes to frictionally enga e-the wall of the recess, a rotatable mem er connected with the s ider, an independent member, pins carrie 'by it adapted to engage the shoes and hold them out of driving contact with the recess wall, and means for controlling the independent member.

9. In a-clutch, the combination of a rotatable driving member, a rotatable driven member, a clutch shoe pivotally connected with one of said members,'means for causing the shoe to engage the other by swinging an engageable surface eccentric to the pivot, an independently rotatable. member having means adapted to engage the shoe and hold it swung on its PIVOi'JtO be out of action, and means for controlling the last mentioned member.

' 10. In a clutch, the combination of a rotatable driving member, a coaxial rotatable driven member, a shoe pivoted to one of said members and havin a surface adapted to enga e the other, the line connecting the engaged surface and the pivot of the shoe being at en angle withthe line connecting "the pivot of the shoe and-.the axisof rotation, whereby the tendency of rotation is to cause the shoe'to engage the other member-by a togqlin action. and means adapted to enga'ge the "s 0e and prevent such toggling action a 11.111 a clutch, the combination of a rot-atablemember having a circular-recess, a spider-within the recess rotatable about the same axis,"a'slioe pivoted to-the spider and adapted to engage the wall of the recess, the

shoe having anengageable surface eccentric ofitspivot and adjacent thereto having a surface'concentric of such pivot, means for holding ithe shoe swung on its pivot with its *concentrlc 'surfacein loose engagement with the walloftherecess and with a line connecting thepoint of beginning of the eccentricsurfacefwith the pivot of the shoe at an angle to theline connecting the pivot of the shoe with the axis of rotation. 12. In a clutch, the combination of a rotatable driving member, a rotatable driven member, a clutch shoe connected with one of said members, a sprin tending to cause such shoe to engage the ot ier member, a controllable abutment for the shoe, means for establishing continuous friction between the member carrying the shoe and the other member, whereby therotation of such other member tends to constrainthc spring and hold the'shoe against the abutment.

. 18. In a clutch, the combination of a rotatable member having a circular recess, a retatable spider within the recess, a shoe pivto a. fa spring between 1 thev spider and the shoe tending'to force the shoe .lIltO engagement with thew'all ofthe recess,

an independent member adapted to hold the shoo out "of engagement, and means independent of-the shoe for establishing a triotional drag between thespider and the wall of the recess. a t

'= -14. In a clutch, the combination of ashaft,

a member thereon having a circular recess, a spider on the shaft, a shoe pivoted to the spider, a spring 'between' the edge of the the wallof the recess.

riedaby the spider-and constantly acting on -15."Ina clutch,:thecombination, with a shaft, of a member thereon havinga circular recess around the shaft, a spider onthe'shaft within the recess, shoes pivotedon the spider I and adapted to bear against the wall of the recess,.spr1ngs:carried by the spider and tending to forcethe shoes into such position,

I springs carried by the-spider and hearing against the heels-of; holding and member. f

against the inner wall of the recess, an independentmember rotatably mounted on the shaft} and having gins adapted to .bear t 0 shoes, and means for releasing the' independent 16. The; combination ofa shaft, a ."cup' thereon, aldevice' surrounding the shaft within the cup, a shoe pivoted to said-device, a sprin tending to cause theshoe to engage the-wall of thec'up, a frictional connection between the device and the wallofthe'cnp,

an independent member having a shoulder adapted to engage the shoe. and a'rotatable member connected with saiddevice.

17. In a clutch, thecombination of a shaft, a driving member thereon having a recess,'a driven member thereon, an independent disk between the two,a spider on the shaft .within the recess connected withithe driven .mem-

ber throughopenings in theindepcndent disk. a shoe pivoted to the spider, means forcausing the shoe to bear against the wall of disk and adapted to form an abutment for the shoe, and a controlling device to-engagc the independent disk. i i

18. The combination of a shaft, a cup thereon, 'a member to be driven on the shaft,

a-controlling disk 'on"the"shaft between 'the cup and driven -member'.-'a driven device surroundingthe shaft within the cup, a connection etween said device and the member to be driven, a shoe pivotedto said device and adapted to engage the wall of the cup, a spring "tending to cause such engagement, means for establishing friction between said device and the wall ofthe cup, and a pin carried by the independent disk adapted to engage the shoe.

- 19. The combination of a shaft, a driven member thereon, a driving member on the shaft having a circular recess, a driven spider on the shaft within the recess, a connection between the spider and driven member, a shoe pivoted to thespider and adapted to'engage the Wall of the recess, a spring ble cup and a rotatable roller'thereon, a disk between the cup andiroller capable of some rotation independent of; either,- a spider 'on the'shaft within thecupfa pair of shoes piv- 'oted to said spider and adapted to engage the wall of the cup, a pairof springs set into sockets inthe edges of the spider and shoes and tending tO '0.\'T)t1nd to seatthe shoes, a pair of pins 'ca'rriedby the independent disk :and a'daptedltobearagainst the heelsnf the .shoes, a pin-:conncctmg the spider with the driven member andpassing loosely through an enlarged opening in 1 the-intermediate disk, a leatspring secured to the edge of the spider and bearing-against the inner pcriph- :cry of the cup, a-ndmeans for controlling the rotation of t independent disk.

; ln testimonywhereof, I hereunto aiiix my I signature m-"the presence of two witnesses. the recess, a pm carried by the independent GEORGE T. TRUNDLE.

Witnesscs R. E. \VAnwIoK, Geo; S. Livmos'ron.

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